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Calibri 83ffff̙̙3f3fff3f3f33333f33333.$TU Delft Repositoryg X)uuidrepository linktitleauthorcontributorpublication yearabstract
subject topiclanguagepublication type publisherisbnissnpatent
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departmentresearch group programmeprojectcoordinates)uuid:5685c1c7-a2f9-4f2e-8525-9578a1773d7dDhttp://resolver.tudelft.nl/uuid:5685c1c7-a2f9-4f2e-8525-9578a1773d7dDetermining finite-width-correction factors for fatigue crack growth prediction in GLARE using the equivalent compliance methodiZhao, Yuan (Harbin Institute of Technology); Alderliesten, R.C. (TU Delft Structural Integrity & Composites); Wu, Zengwen (Harbin Institute of Technology); Zhou, Zhengong (Harbin Institute of Technology); Fang, Guodong (Harbin Institute of Technology); Zhang, Jiazhen (Harbin Institute of Technology); Benedictus, R. (TU Delft Structural Integrity & Composites)Finite-width-correction factors (FWCF) are required for GLARE to accurately predict fatigue crack growth using linear elastic fracture mechanics. As demonstrated in earlier work, these factors effectively correct for the change in specimen compliance, which in GLARE relates to intact fibre layers and the formation of delaminations between these layers and the cracked metal layers. Therefore, the development of delaminations in various GLARE grades were studied using digital image correlation during fatigue crack growth experiments under different maximum stresses and stress ratios. The elongation of GLARE in loading direction was recorded by crosshead displacement during fatigue testing, and was correlated to the observed development of the delamination area. The relationship between effective delamination area and effective GLARE specimen compliance is used as basis for determining explicit formulations for the FWCF for GLARE.MApplied work; Compliance; Delamination; Finite-width-correction factor; GLAREenjournal articleEGreen Open Access added to TU Delft Institutional Repository You share, we take care! Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.
2021-06-06)uuid:f1fba7c4-0342-4daa-b835-16197761c259Dhttp://resolver.tudelft.nl/uuid:f1fba7c4-0342-4daa-b835-16197761c259tOn the physics of applying finite width and geometry correction factors in fatigue crack growth predictions of GLAREZhao, Y. (TU Delft Structural Integrity & Composites; Harbin Institute of Technology); Alderliesten, R.C. (TU Delft Structural Integrity & Composites); Zhou, Zhengong (Harbin Institute of Technology); Fang, Guodong (Harbin Institute of Technology); Zhang, Jiazhen (Harbin Institute of Technology); Benedictus, R. (TU Delft Aerospace Structures & Materials; TU Delft Structural Integrity & Composites)gIn general, a finite width correction to stress intensity factor (SIF) is required in the fatigue crack growth. The finite width correction factor can be explained physically from the energy point of view. It is assumed that the finite width correction factor primarily constitutes an energy correction factor, i.e. it corrects the applied load for the work applied. To evaluate the finite width correction for FMLs, constant amplitude load fatigue crack growth tests were performed on monolithic aluminium 2024-T3 and the Fibre Metal Laminate GLARE containing 2024-T3 aluminium layers. The loads and displacements were recorded to quantify the total amount of work applied throughout each fatigue test. The crack length and delamination size were monitored by using digital image correlation technique to evaluate the dissipative energy. It appears that the Feddersen's and all other standard finite width correction significantly overestimates the effect for FMLs. The finite width correction to SIF for FMLs is small but cannot be neglected, and it is also greatly related to the Glare grades, stress ratio and stress level.XEnergy; Fatigue; Fibre metal laminates; Finite width correction; Stress intensity fac<tor
2019-03-01
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